skylight.

UAL2365 United

Airbus A319 131 · N838UA · SJC → ORD

· 1:49Quality 94side-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −80%). Download

Trace

Where the aircraft sat in the frame, second by second. Click the chart to jump the video there.

—FOV —az —el —pose —
Lock

Events

Tracking metrics

How well the camera kept the aircraft centred. Tap a metric for what it means and what good looks like.

Lockshare of the pass
91%
First lockfrom target selected
5.9 s
Centring, medianaz / el while locked
0.11° / 0.15°
Centring, 90th pctaz / el while locked
0.26° / 0.36°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
4.3 s
Time to tightestfrom first lock
35.3 s
Time at telefield of view ≤ 5.5°
97.4 s
Jitter at teleaz / el, standard deviation
0.16° / 0.18°
Swing at teleaz / el, peak to peak
1.01° / 1.33°
Pan reversalsper 10 s at tele
0.4
Largest pan hopin any 1 s at tele
2.94°
Largest tilt hopin any 1 s at tele
1.02°
Pose error, mediancommand vs camera
0.31°
Largest correctionvision vs prediction
1.34°
Zoom steps
27

Aircraft & route

Flight
UAL2365
Registration
N838UA
Type
Airbus A319 131
Airline
United
From
SJC · San Jose
To
ORD · Chicago
Ground speed
277 kt
Altitude at closest
7,350 ft
Vertical rate
+3,648 ft/min
Category
A3
ICAO hex
ab77d5

Pass geometry

Max elevation
33.4°
Elevation at start → end
33.4° → 12.4°
Azimuth at start → end
244° WSW → 185° S
Closest-approach azimuth
244° WSW
Minimum slant range
4.1 km
Heading at closest
174° S
Aspect at closest
side-on (70°)
Turn
straight (0°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:49 (109.1 s)
Lock
91%

Build & tuning

The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.

Build
2026-10-16c — mount prior carried to the next target (silhouette reach reverted)
Commit
8649c7d
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
53.2 MB · 103.5 s · offset -0.3 s
pursuit
velocity
maxLeadSec
3
panLatencySec
0.6
tiltLatencySec
0.4
rippleDeg
0.5
rippleTeleDeg
0.25
maxSpeedStepFwps
0.45
speedReachFrac
0.8
lockedSigmaDeg
0.35
sigmaGrowthDps
0.1
aimLeadSec
-0.1
correctionSlewDps
2.5
kp
1
ki
0.6

This clip and poster are © Skylight (Cameron Paczek): free for non-commercial use with credit to skylightceiling.com, not MIT. License